Gear-cutter



(No Model.) mm P. J. MATHEIN.

GEAR CUTTER.

No; 600,544. Patented Mar. 15,1898.

M I i amwzutoz 9am M 21522534 UNITED STATES PATENT OFFICE.

FRANK J. MATHEIN, OF NEW HAVEN, CONNECTICUT.

GEAR-CUTTER.

SPECIFICATION forming part of Letters Patent No. 600,544, dated March15, 1898.

Application filed December 1, 1896. serial No. 614,073. (No model.)

To aZZ whom it may concern:

Be it known that I, FRANK J. MATHEIN, a citizen of the United States,residing at New Haven, in the county of New Haven and State ofConnecticut, have invented a certain new and useful Improvement inGear-Cutters, of which the following is a specification.

The object of this invention is to provide efficient means for rapidlyand economically cutting gears, pinions, and similar articles.

A further object is to so construct and arrange the apparatus as topermit the utilization of lathe mechanism, such as is commonly 1n use.

A further object is to provide for the cutting of gears or pinions ofvarious kinds, such as spur-gears and beveled gears, on the samemachine.

In carrying out the invention I employ a lathe-bed having a head-stockwith live center and a back support, tail-stock, or other deviceadjustable upon said bed and capable of aifording a bearing for one endof an arbor, the other end of which is mounted on and driven by saidhead-stock. Keyed or otherwise secured to the arbor is a revolublecutter-head, by means of which the teeth in the peripheries of the gearor pinion blanks are formed. In juxtaposition to the cutterhead I employa revoluble work-carrier upon which are mounted the blanks to be out.This carrier is not only revoluble, so as to present the blankssuccessively to the action of the cutter-head, but is vertically adj ustable in order that the blanks may be so presented in a plane coincidentwith the diameter of the revoluble cutter-head (to form spur gears orpinions) or in a plane above or below such diameter, (to form beveledgears or pinions.) Means are also provided whereby the work-carrier maybe adjusted toward and from the cutter-head. After one blank has beencut the carrier is given a partial revolution, so as to present the nextblank to the action of the cutter.

The invention is illustrated in the accompanying drawings, in which-Figure 1 is a top plan view of a gear-cutting machine embodying myinvention. Fig. 2 is an end view of the work-carrier and its supportingand adjusting mechanism, and Fig. 3 is a detail view illustrating meansfor locking the carrier in position while a blank is being cut.

Referring to the drawings, in which similar letters of reference denotecorresponding parts, A designates a lathe-bed having the grooved arms aa, the head-stock a powershaft a and tail-stock a adjustable toward andfrom the head-stock upon the grooved arms a a.

B designates an arbor. One end of this is mounted upon the live center aof the head stock 0. and the other end is mounted upon the pivot a ofthe back support a Motion is imparted to this arbor by means of thehead-stock a through the lathe-dog a 0 designates the cutter-head. Thisis keyed or otherwise secured to the arbor B, so as to turn therewith.The periphery of the cutter is provided with circumferential threads 0and with channels 0.

D designates the work carrier. This is here shown in the form of a diskprovided near its periphery with a series of perforations (1, throughwhich pass pins (1, supporting the blanks (Z The carrier is mounted uponthe sliding support E, being secured thereto in the present instance bymeans of the screw D, the upper portion (1 of which (not threaded) actsas the pivot of the car- .rier D. Between the carrier D and the supportE is a washer F. In practical use each machine may be provided with anumber of these varying in thickness, so as. to locate the carrier Dabove or below a plane coincident With the diameter of the cutter-headO.

The under side of the sliding support E is rabbeted, as shown at e, andwith this rabbet engages the projection 9 upon the uppersurface of theslide-rest G. The movement of the support E relatively to the slide-restG is regulated by the screw 6, having the handle e Ihave shown theslide-rest G mounted upon pivots g to permit of fine adjustment of thecarrier D and the blanks carried thereby relatively to the cutter-head,so that the blanks may be presented to the cutter-head in any planeperpendicular to the plane of revolution of the cutter-head. Thisadjusting device enables the cutting of any sort of bevel-teeth on theblanks and enablesa much finer and more convenient adjustment of theblanks to the cutter-head than would be permitted by merely raising andlowering the work-carrier D and not tilting it with reference to thecutter-head. I may, if desired, provide such rest with means (not shown)for locking'it in any position in which it maybe placed.

H designates a flat spring secured at one end h to the upper surface ofthe sliding support E, its other end projecting outwardly and upwardly,as shown in Fig. 3. This spring is provided With a perforationcoinciding with one of the series of perforations din the work-carrierD, so that one of the blankholding pins d may pass through. one of saidperforations cl and engage with the perforation in said spring in orderto lock the carrier D in position while a blank is being cut.

The operation of the machine above described is as follows: Revolublemovement is transmitted to the cutter-head O by means of the live centerof the head and power-shaft of the lathe. Each of the perforations d inthe Work-carrier D is supplied with a pin d, holding a blank C1 and oneof said pins is permitted to enter the perforation in the spring H tolock the carrier against accidental revoluble movement. If it is desiredto form these blanks into spur gears or pinvide the blank with teethextending continuously around its periphery, after which the locking-pinis removed from engagement with the perforation in thespring H and thecarrier given a partial revolution, so as to present another blank tothe action of the cutter-head.

If it is desired to cut beveled gears or pinions, the carrier is soadjusted as that the blanks will be presented to the cutter in a planebelow the diameter of said cutter, so that the line of thrust of thecutting-threads will be at the proper angle relatively to the horizontalplane of the blanks, or by means of the pivot g the slide-rest G may betilted so as to present the blanks upon the workcarrier at a properangle to the cutter-head, and thus form the beveled teeth of the'blanks.

What I claim is- 1. Inamachineforcuttinggears,the combination of arevoluble cutter-head with means for successively feeding a series ofblanks thereto at any angle in a plane perpendicular to the plane ofrevolution of the cutter-head substantially as set forth.

2. In a machine for cutting gears,the combination of the revolublecutter-head with a work-carrier adjustably mounted so as to deliver aseries of blanks at any angle in a plane, perpendicular to the plane ofrevolution of said cutter-head, and means for moving said work-carrierand thereby feeding the blanks to said cutter-head, substantially as setforth.

3. In a machine for cutting gears,the combination of a revolublecutter-head with a revoluble work-carrier, means for mounting'saidwork-carrier so as to present the work carried thereon at any desiredangle in a plane perpendicular to the revolution of the cutterhead, andmeans for revolving said carrier, substantially as set forth.

4. In a machine for cutting spur or beveled gears, the combination witha revoluble cutter-head adapted to cut teeth in the entire periphery ofcircular blanks, of a moving work-carrier supporting a series ofrevoluble blanks and presenting them successively to said cutter-head,substantially as set forth.

5. In a machine for cutting gears,the combination with a revolublecutter adapted to cut teeth in the entire periphery of circular blanks,of a moving work-carrier supporting a series of revoluble blanks, meansfor feeding the blanks successively to the cutter, and means for lockingthe said carrier during the revolution of the blanks, substantially asset forth.

6. In an attachment for lathes for cutting gears, thecombination of arevoluble cutter carried between the head-stock and tail-stock of thelathe with a movable Work-carrier attached to the frame of the lathe andadapted to support a series of blanks, and means for moving said carrierand thereby feeding said blanks successively to said cutter,substantially as set forth.

7. In an attachment for lathes for cutting gears, the combination with arevoluble cutter carried between the head-stock and tailstock of thelathe of a work-carrier and series of blanks thereon, said work-carrierbeing adapted to feed the blanks at any desired angle in a planeperpendicular to the revolution of the cutter, and means for moving saidcarrier to feed the blanks, substantially as set forth.

This specification signed and witnessed this 24th day of November, 1896.

FRANK J. MATIIEIN.

Witnesses:

LEONARD M. DAGGETT, CLARA B. UNDERwooD.

ICC

